ok, pogo is not a sheeva, but should work somehow. So I can get green LED on by entering
echo "default-on" > /sys/class/leds/sheevaplug\:blue\:health/trigger
but I can't get red one to light up by
echo "default-on" > /sys/class/leds/sheevaplug\:red\:misc/trigger
any ideas?

Try the latest kirkwood-pogo_e02.dtb in this tarball linux-5.1.11-kirkwood-tld-2-bodhi.tar.bz2.

QuoteUpdated 01 Jul 2019:

Kernel linux-5.1.11-kirkwood-tld-2 package has been uploaded. The following features were added/updated:

- Pick up mainline kernel security patch for TCPSACK.
- The SSD and Device Mapper mainline bug was fixed in this version.
- Enable RAID and LVM as kernel builtin modules (we can boot with RAID or LVM without needing to load uInitrd first. In previous kernel version RAID and LVM drivers were loadable modules).

Latest Linux kernel 5.x general release information can be found at:
LinuxChanges log

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